Scroll-sawing machine



(No Model.) 2 Sheets-Sheet 1.

H. L. HOPKINS.

SCROLL SAWING MACHINE. No. 324,842. Pater lt ed Aug. 25, 1885.

Fly 1 c C i 1 ZZI'ZESSES: i e INVENTOR: .4 0 I i O z/qw g ffiw/ (Mm/6M(No Model.) 2 Sheets-Sheet 2. H. L. HOPKINS.

SCROLL SAWING MACHINE.

Patented Aug; 25, 1885.

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others June 24, 1884.

llnrrnn STATES PATENT Drrrcn.

HENRY L. HOPKINS, OF CARD, MICHIGAN.

SCROLL-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 324,842, dated August25, 1885.

Application filed Ma G, 1885. (No model) To all whom it may concern;

Be it known that I, HENRY L. HOPKINS, a citizen of the United States,residing at Caro, in the county of Tuseola and State of Michigan,haveinveuted certain new and useful Improvements in Saw-Table Gages; andI do de elare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and t0 the letters and figures of referencemarked thereon, which form a part of this specification.

The object of my present invention is to pro vide suitable means forcutting from boards or planks curved strips, as stair-railings and thelike, by first placing the article to be out upon a slant or pitch thatwill be coincident with the position the cut-out strip will assume whenin its proper position as a finished article; and my invention consistsin the combination of parts forming an attachment to scroll-sawing,upright, or endless belt machines, as hereinafter set forth, and pointedout in the claims, and is designed as an improvement upon Letters PatentNo. 300,975, issued to myself and In the drawings forming a part of thisspecification, Figure I is a front elevation of my in vention attachedto a scroll-sawing machine. Fig. 2 is an enlarged detail. Fig. 3 is anend elevation, part in section. Figs. 4c and 5 are enlarged details.Fig. 6 is a detail.

A represents an ordinary saw-table; D, the flywheel; P, the pitmanconnecting the crank of said wheel with the saw S. The upper end ofthesaw worksin the guide 9, depending from the beam B overhead.

0 O are guides or slideways for the lower end of the saw, and areattached to the bar B of the sawtable.

d d d are counter-shafts provided with conepulleys for regulating thefeed, all of which are common.

To the beam 13 and bar B of the table I attach the horizontaladjusting-supports h h by means of the bolts and thumb-nuts t. Pivotedin the free ends of said supports is a vertical reciprocating or rockshaft, F. Said trated by the points 1: of said dogs.

shaft is round in its upper and lower portions,

1 having a square central portion, I-I. Pivoted thereto is a tiltingarm, E, having the web or extension plate a, formed integral therewith,and said plate is provided with a circular channel, a. (See Fig. 4.) Thetiltingarm E is bolted loosely at z to said shaft, forming a pivot uponwhich it swings. A bolt, t, works within the slot a, and by a nut onsaid bolt the tilting arm is held when adjusted, for the purposeshereinafter set forth. To the free ends of the tilting arm I attach thesliding dogs (1 cl, which are adjusted to or from each other byloosening the thumbserews c cand sliding the dogs as required.

WV represents the plank from which the curved material is cut, and issecured in position by placing the back edge against the vertical.portion a of the dogs 01 d (see Figs. 1 and 3,) the faces of the plankbeing pene- I also pass a screw through the hole 6 of the rear dog,which enters the edge of the plank, thus securing the material to besawed firmly.

I attach to the sawguides O O the yoke m. (See Fig.2 and dotted lines ofFig. 1.) To

the upper end of said yoke I pivotally attach the curved rest or supportR, which is located in front of the saw and supports the material beingsawed.

()n the back side of the saw-table I locate the vertical shaft D,havingcog-wheel a which engages with the cog-wheelf on a countershaft, d. (SeeFig-3.) Said shaft is provided with a cone of pulleys, J, to regulatethe speed of said shaft D, carrying the spool S. When said shaft is ingear, by means of the lever N, the spool revolves, winding up the cordor feeding-wire t, which passes over the adjustable hanger z to the rearcorner or end of the plank NV, and by ahook, c, is secured to saidplank. (See Figs. 1 and 3.) The hanger z is made to slide to and fromthe saw in the channel I) of the bar 0, which supports it, so as tobring the feeding-cord from the hanger to the lower end of the plankbeing cut in a direct line with the edge ofsaid in Fig. 3.

The operations in sawing are as follows: The nut or bolt is loosenedwhen the tilting arm E is given the pitch to correspond with the slantof a stair-rail or the angle desired,

plank, asshown of the piece to be cut, when the nut is tightened. Theplank W is secured by one edge to said bar by means of the dogs, as setforth, and to give the article to be sawed the desired are or curve thethumb-screwsr' are loosened, the reciprocating shaft F is moved towardthe saw S to out a small curve, and from said saw to increase the curveby setting the supports it h to the scale L on the parts B B. (See Fig.1.) When said shaft is in position, the thumbscrews z'are fastened. Theplank W is swung around until the front end or edge meets the saw, whenthe hook to of the feeding cord t is attached, as shown in Fig. 1. TheleverN is raised, as shown in Figs. 1 and 3, when the feeding-shaft Dwill be in gear, causing said shaft to revolve, winding up the cord 16,drawing the plank forward, up, and around as the saw enters, as shown inFigs. 1 and 2. The support R under the plank WV causes said plank torise in passing over it, according to the pitch given it by the adjustingarm E, and as said plank rises the reciprocating shaft is alsoraised, as shown by dotted lines in Figs. 1 and 4. As soon as the archas been cut, the lever N is thrown down, stopping the feedingshaft D,when the plank swings back to the starting-point.

In Fig. l I show the saw cutting a leithand curve. To cut a right-handcurve the shaft F is detached and placed in a like position upon theopposite side of the saw, with the position of the tilting arm reversed.

NVhen desirous to use the saw-table for other purposes, the shaft F isremoved, the yoke m and rest R are taken off, when I insert thetable-top extension T, (shown in Fig. 6,) the arms 0 c passing under thestationary top, occupying the dotted position 0, (shown in Fig. 1,) theslot 3 receiving the saw, thus making a flat-top table for ordinarywork.

In my former patent I employed a table through which the saw passed andupon which the material to be cut was placed. In my present invention Idispense with the table enof the tilting arm E, pivoted to said shaft,of

a pair of dogs mounted upon said arm, said dogs adapted to clamp thematerial to be cut,

of a pivoted support located in advance of the saw and below thematerial to be sawed, substantially as specified.

2. The combination, with an upright saw ing-machine, of the shaft F,journaled within the plates h h, said plates attached to the frame ofthe machine, of the tilting arm E, having the plate a, formed integraltherewith, said arm pivoted to the shaft F, the means for adjusting saidarm on said shaft, of a pair of dogs mounted upon said arm, said dogsadapted to clamp the material to be cut, and the pivoted rest It,located in advance of the saw and below the material to be sawed, as andfor the purposes set forth.

3. The combination, with an upright saw ing-.machine, of the shaft F,journaled in the plates h h, said shaft having the tilting arm Eattached thereto, said arm having the extension-plate n, and the meansfor attaching said plate to the shaft F, of'a pair of dogs adjustablymounted upon said arm, said dogs adapted to clamp the material to becut, of the yoke m, supporting the rest R, the feeding-shaft D, itsspool S, the feed-cord 16, its hook a, the lever N, and pinions foroperating said feedshaft, as and for the purposes specified.

In testimony whereof I a'ffix my signature in presence of two witnesses.

HENRY L. HOPKINS.

WVitnesses:

R. J. PARKHURST, J OHN BULLEN.

